CLAS physics database search results Measurement E159M378 E1-6 V. Burkert 2001 psi(pi-) dsigma/dpsi_pim Data errors deg mcb/rad mcb/rad 30 0.77459 0.113586 90 0.815997 0.115617 150 0.916054 0.130182 210 0.942048 0.135902 270 0.777526 0.109428 330 0.732973 0.102696